1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include "lint.h"
30 #include <sys/types.h>
31 #include <wchar.h>
32 #include <limits.h>
33 #include <string.h>
34 #include "libc.h"
35
36 wchar_t *
wmemcpy(wchar_t * ws1,const wchar_t * ws2,size_t n)37 wmemcpy(wchar_t *ws1, const wchar_t *ws2, size_t n)
38 {
39 wchar_t *p1, *p2;
40 size_t len;
41 size_t max = SIZE_MAX / sizeof (wchar_t);
42
43 if (n <= max) {
44 return ((wchar_t *)memcpy((void *)ws1,
45 (const void *)ws2, n * sizeof (wchar_t)));
46 }
47
48 p1 = ws1;
49 p2 = (wchar_t *)ws2;
50 do {
51 if (n > max) {
52 len = max;
53 } else {
54 len = n;
55 }
56 (void) memcpy((void *)p1,
57 (const void *)p2, len * sizeof (wchar_t));
58 n = n - len;
59 p1 += len;
60 p2 += len;
61 } while (n != 0);
62 return (ws1);
63 }
64